N52832-CIAA don't work

[alex]

hi!

I use the reference design of  nrf52832_ciaa.IntLib ,but it didn't work

I use the internal-LDO ,but i measure the voltage of DEC4, it's 2.5V(not 1.3V), the VDD is 2.9V

which reason can cause the DEC4 to 2.5V?

[haakonsh]

Can you share the layout as well? 

[alex]

1727.NRF52832-CIAA.zip

[haakonsh]

This is far from the reference layout. You're not even connected to ground and you're missing the antennas impedance matching network. If you need such a small device I suggest you look into the SiP modules from our third party module vendors. You WILL need at least a 4-layer board to make this work on such a small board. 

[alex]

thanks ! i made a big mistake in layout, and i'll take your advise to improve it.

thanks again!

[haakonsh]

Send it to us for review before you print it next time :P